/* 
 * Copyright (c) 2000-2003 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the
 *   distribution.
 * - Neither the name of the copyright holders nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @author Jonathan Hui
 * @author Joe Polastre
 */

generic module GpioCaptureC() @safe() {

  provides 
  {
      interface GpioCapture as Capture;
  }
  uses 
  {
      interface HplSam3TCCapture as TCCapture;
      interface HplSam3GeneralIOPin as GeneralIO;
  }

}

implementation {

  error_t enableCapture( uint8_t mode ) {
    atomic {
      call TCCapture.disable();
      call GeneralIO.disablePioControl();
      call GeneralIO.selectPeripheralA();

      call TCCapture.setEdge( mode );
      call TCCapture.clearPendingEvent();
      call TCCapture.clearOverrun();
      call TCCapture.enable();
    }
    return SUCCESS;
  }

  async command error_t Capture.captureRisingEdge() {
    return enableCapture( TC_CMR_ETRGEDG_RISING );
  }

  async command error_t Capture.captureFallingEdge() {
    return enableCapture( TC_CMR_ETRGEDG_FALLING );
  }

  async command void Capture.disable() {
    atomic {
      call TCCapture.disable();
    }
  }

  async event void TCCapture.captured( uint16_t time ) {
    call TCCapture.clearPendingEvent();
    call TCCapture.clearOverrun();
    signal Capture.captured( time );
  }

  async event void TCCapture.overrun()
  {
  }

}
